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• Problem when getting pageContent of an unavailable URL in Java

  - by tiendv

  I have a code for get pagecontent from a URL: import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.URL; import java.net.URLConnection; public class GetPageFromURLAction extends Thread { public String stringPageContent; public String targerURL; public String getPageContent(String targetURL) throws IOException { String returnString=""; URL urlString = new URL(targetURL); URLConnection openConnection = urlString.openConnection(); String temp; BufferedReader in = new BufferedReader( newInputStreamReader(openConnection.getInputStream())); while ((temp = in.readLine()) != null) { returnString += temp + "\n"; } in.close(); // String nohtml = sb.toString().replaceAll("\\<.*?>",""); return returnString; } public String getStringPageContent() { return stringPageContent; } public void setStringPageContent(String stringPageContent) { this.stringPageContent = stringPageContent; } public String getTargerURL() { return targerURL; } public void setTargerURL(String targerURL) { this.targerURL = targerURL; } @Override public void run() { try { this.stringPageContent=this.getPageContent(targerURL); } catch (IOException e) { e.printStackTrace(); } } } Sometimes I receive an HTTP error of 405 or 403 and result string is null. I have tried checking permission to connect to the URL with: URLConnection openConnection = urlString.openConnection(); openConnection.getPermission() but it usualy returns null. Does mean that i don't have permission to access the link? I have tried stripping off the query portion of the URL with: String nohtml = sb.toString().replaceAll("\\<.*?>",""); where sb is a Stringbulder, but it doesn't seem to strip off the whole query substring. In an unrelated question, I'd like to use threads here because I must retrieve many URLs; how can I create a multi-thread client to improve the speed?

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• .NET MVC custom routing with empty parameters

  - by user135498

  Hi All, I have a .net mvc with the following routes: routes.Add(new Route( "Lookups/{searchtype}/{inputtype}/{firstname}/{middlename}/{lastname}/{city}/{state}/{address}", new RouteValueDictionary( new { controller = "Lookups", action = "Search", firstname = (string)null, middlename = (string)null, lastname = (string)null, city = (string)null, state = (string)null, address = (string)null, SearchType = SearchType.PeopleSearch, InputType = InputType.Name }), new MvcRouteHandler()) ); routes.Add(new Route( "Lookups/{searchtype}/{inputtype}", new RouteValueDictionary( new { controller = "Lookups", action = "Search", firstname = "", middlename = "", lastname = "", city = "", state = "", address = "" }), new MvcRouteHandler()) ); routes.Add(new Route( "Lookups/{searchtype}/{inputtype}", new RouteValueDictionary( new { controller = "Lookups", action = "Search", firstname = "", middlename = "", lastname = "", city = "", state = "", address = "", SearchType = SearchType.PeopleSearch, InputType = InputType.Name }), new MvcRouteHandler()) ); routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Account", action = "LogOn", id = "" } // Parameter defaults ); The following request works fine: http://localhost:2608/Lookups/PeopleSearch/Name/john/w/smith/seattle/wa/123 main This request does not work: http://localhost:2608/Lookups/PeopleSearch/Name/john//smith//wa/ Not all requests will have all paramters and I would like empty parameters to be passed to the method as empty string or null. Where am I going wrong? The method: public ActionResult Search(string firstname, string middlename, string lastname, string city, string state, string address, SearchType searchtype, InputType inputtype) { SearchRequest r = new SearchRequest { Firstname = firstname, Middlename = middlename, Lastname = lastname, City = city, State = state, Address = address, SearchType = searchtype, InputType = inputtype }; return View(r); }

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• Incorporating Devise Authentication into an already existing user structure?

  - by Kevin

  I have a fully functional authentication system with a user table that has over fifty columns. It's simple but it does hash encryption with salt, uses email instead of usernames, and has two separate kinds of users with an admin as well. I'm looking to incorporate Devise authentication into my application to beef up the extra parts like email validation, forgetting passwords, remember me tokens, etc... I just wanted to see if anyone has any advice or problems they've encountered when incorporating Devise into an already existing user structure. The essential fields in my user model are: t.string :first_name, :null => false t.string :last_name, :null => false t.string :email, :null => false t.string :hashed_password t.string :salt t.boolean :is_userA, :default => false t.boolean :is_userB, :default => false t.boolean :is_admin, :default => false t.boolean :active, :default => true t.timestamps For reference sake, here's the Devise fields from the migration: t.database_authenticatable :null => false t.confirmable t.recoverable t.rememberable t.trackable That eventually turn into these actual fields in the schema: t.string "email", :default => "", :null => false t.string "encrypted_password", :limit => 128, :default => "", :null => false t.string "password_salt", :default => "", :null => false t.string "confirmation_token" t.datetime "confirmed_at" t.datetime "confirmation_sent_at" t.string "reset_password_token" t.string "remember_token" t.datetime "remember_created_at" t.integer "sign_in_count", :default => 0 t.datetime "current_sign_in_at" t.datetime "last_sign_in_at" t.string "current_sign_in_ip" t.string "last_sign_in_ip" t.datetime "created_at" t.datetime "updated_at" What do you guys recommend? Do I just remove email, hashed_password, and salt from my migration and put in the 5 Devise migration fields and everything will be OK or do I need to do something else?

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• ASP.NET MVC 2 - How do I use an Interface as the Type for a Strongly Typed View

  - by Rake36

  I'd like to keep my concrete classes separate from my views. Without using strongly typed views, I'm fine. I just use a big parameter list in the controller method signatures and then use my service layer factory methods to create my concrete objects. This is actually just fine with me, but it got me thinking and after a little playing, I realized it was literally impossible for a controller method to accept an interface as a method parameter - because it has no way of instantiating it. Can't create a strongly-typed view using an interface through the IDE either (which makes sense actually). So my question. Is there some way to tell the controller how to instantiate the interface parameter using my service layer factory methods? I'd like to convert from: [Authorize] [AcceptVerbs(HttpVerbs.Post)] [UrlRoute(Path = "Application/Edit/{id}")] public ActionResult Edit(String id, String TypeCode, String TimeCode, String[] SelectedSchoolSystems, String PositionChoice1, String PositionChoice2, String PositionChoice3, String Reason, String LocationPreference, String AvailableDate, String RecipientsNotSelected, String RecipientsSelected) { //New blank app IApplication _application = ApplicationService.GetById(id); to something like [Authorize] [AcceptVerbs(HttpVerbs.Post)] [UrlRoute(Path = "Application/Edit/{id}")] public ActionResult Edit(String id, IApplication app) { //Don't need to do this anymore //IApplication _application = ApplicationService.GetById(id);

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• Returning an array of culture formatted dates C# MVC3

  - by user1875797

  I'm new to programming and trying to do an exercise that formats a date to the Thai culture in a variety of formats this is what I have for my code so far: public String[] FormatAsSpecified(DateTime theDate, String theCulture, String[] formats) { String[] dateResults = new String[formats.Length]; CultureInfo culture = CultureInfo.GetCultureInfo(theCulture); for (int i = 0; i < formats.Length; i++) { String culture_formatted_date = theDate.ToString(formats[i], culture); dateResults[i] = culture_formatted_date; } return dateResults; } This is the test method that goes with it: [TestMethod] public void FormatAsSpecifiedReturnsDateLiteralsInSpecifiedFormatForAllStandardFormatStrings() { //Arrange var controller = new DateController(); var theDate = new DateTime(2014, 2, 14, 9, 15, 32, 376); String theCulture = "th-TH"; // Array of all supported standard date and time format specifiers. String[] formats = { "d", "D", "f", "F", "g", "G", "m", "o", "r", "s", "t", "T", "u", "U", "Y" }; //Corresponding date literals for the standard Thai regional settings String[] expectedResults = {"14/2/2557" , "14 ?????????? 2557" , "14 ?????????? 2557 9:15" , "14 ?????????? 2557 9:15:32" , "14/2/2557 9:15" , "14/2/2557 9:15:32" , "14 ??????????" , "2014-02-14T09:15:32.3760000" , "Fri, 14 Feb 2014 09:15:32 GMT" , "2014-02-14T09:15:32" , "9:15" , "9:15:32" , "2014-02-14 09:15:32Z" , "??????????? 14 ?????????? 2014 9:15:32" , "?????????? 2557"}; //Act String[] actualResults = new String[15]; for (int i = 0; i < formats.Length; i++) { actualResults[i] = controller.FormatAsSpecified(theDate, theCulture, formats[i]); } //Assert CollectionAssert.AreEqual(expectedResults, actualResults); } I get an error in the test method at 'controller.FormatAsSpecified(theDate, theCulture, formats[i]);' that says "Argument 3, cannot convert from 'string' to 'string[]'" What am I doing wrong?

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• Controller changes format on variables when publishing

  - by Christoffer

  I am a newbie to ROR but catching on quickly. I have been working on this problem for a couple of hours now and it seems like a bug. I does not make any sense. I have a database with the following migration: class CreateWebsites < ActiveRecord::Migration def self.up create_table :websites do |t| t.string :name t.integer :estimated_value t.string :webhost t.string :purpose t.string :description t.string :tagline t.string :url t.integer :adsense t.integer :tradedoubler t.integer :affiliator t.integer :adsense_cpm t.boolean :released t.string :empire_type t.string :oldid t.string :old_outlink_policy t.string :old_inlink_policy t.string :old_priority t.string :old_profitability t.integer :priority_id t.integer :project_id t.integer :outlink_policy_id t.integer :inlink_policy_id t.timestamps end end def self.down drop_table :websites end end I have verified that what is created in the database also is integers, strings etc according to this migration. I have not touched the controller after generating it through scaffold, i.e. it is the standard controller with show, index etc. Now. When I enter data into the database, either through the web form, in rails console or directly in the database - such as www.domain.com for url or 500 for adsense - it will be created in the db without problem. However, when it is being published on the website the variables go completely nuts. Adsense (integer) turns into date, url (string) turns into a float, and so on. This only happens to a few of the variables. This will also create a problem with "argument out of range" since I input 500 and Rails will try to output it as date = crash and "argument out of range". So, how do I fix/trouble shoot this? Why do the formats change? Could it be because of the respond_to in the controller? Cheers, Christoffer

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• Static Property losing its value intermittently ?

  - by joedotnot

  Is there something fundamentally wrong with the following design, or can anyone see why would the static properties sometimes loose their values ? I have a class library project containing a class AppConfig; this class is consumed by a Webforms project. The skeleton of AppConfig class is as follows: Public Class AppConfig Implements IConfigurationSectionHandler Private Const C_KEY1 As String = "WebConfig.Key.1" Private Const C_KEY2 As String = "WebConfig.Key.2" Private Const C_KEY1_DEFAULT_VALUE as string = "Key1defaultVal" Private Const C_KEY2_DEFAULT_VALUE as string = "Key2defaultVal" Private Shared m_field1 As String Private Shared m_field2 As String Public Shared ReadOnly Property ConfigValue1() As String Get ConfigValue1= m_field1 End Get End Property Public Shared ReadOnly Property ConfigValue2() As String Get ConfigValue2 = m_field2 End Get End Property Public Shared Sub OnApplicationStart() m_field1 = ReadSetting(C_KEY1, C_KEY1_DEFAULT_VALUE) m_field2 = ReadSetting(C_KEY2, C_KEY1_DEFAULT_VALUE) End Sub Public Overloads Shared Function ReadSetting(ByVal key As String, ByVal defaultValue As String) As String Try Dim setting As String = System.Configuration.ConfigurationManager.AppSettings(key) If setting Is Nothing Then ReadSetting = defaultValue Else ReadSetting = setting End If Catch ReadSetting = defaultValue End Try End Function Public Function Create(ByVal parent As Object, ByVal configContext As Object, ByVal section As System.Xml.XmlNode) As Object Implements System.Configuration.IConfigurationSectionHandler.Create Dim objSettings As NameValueCollection Dim objHandler As NameValueSectionHandler objHandler = New NameValueSectionHandler objSettings = CType(objHandler.Create(parent, configContext, section), NameValueCollection) Return 1 End Function End Class The Static Properties get set once on application start, from the Application_Start event of the Global.asax Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs) //Fires when the application is started AppConfig.OnApplicationStart() End Sub Thereafter, whenever we want to access a value in the Web.Config from anywhere, e.g. aspx page code-behind or another class or referenced class, we simply call the static property. For example, AppConfig.ConfigValue1() AppConfig.ConfigValue2() This is turn returns the value stored in the static backing fields m_field1, m_field2 Problem is sometimes these values are empty string, when clearly the Web.Config entry has values. Is there something fundamentally wrong with the above design, or is it reasonable to expect the static properties would keep their value for the life of the Application session?

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• android upload progressbarr not working

  - by pieter

  I'm a beginner in Android programming and I was tryinh to upload an image to a server. I found some code here on stackoverflow, I adjusted it and it still doesn't work. The problem is my image still won't upload. edit I solved the problem, I had no rights on the folder on the server. Now I have a new problem. the progresbarr doesn't work. it keeps saying 0 % transmitted does anyone sees an error in my code? import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.app.ProgressDialog; import android.content.Context; import android.content.DialogInterface; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.AsyncTask; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.Window; import android.widget.Button; import android.widget.ImageView; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL; public class PreviewActivity extends Activity { /** The captured image file. Get it's path from the starting intent */ private File mImage; public static final String EXTRA_IMAGE_PATH = "extraImagePath" /** Log tag */ private static final String TAG = "DFH"; /** Progress dialog id */ private static final int UPLOAD_PROGRESS_DIALOG = 0; private static final int UPLOAD_ERROR_DIALOG = 1; private static final int UPLOAD_SUCCESS_DIALOG = 2; /** Handler to confirm button */ private Button mConfirm; /** Handler to cancel button */ private Button mCancel; /** Uploading progress dialog */ private ProgressDialog mDialog; /** * Called when the activity is created * * We load the captured image, and register button callbacks */ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); setContentView(R.layout.preview); setResult(RESULT_CANCELED); // Import image Bundle extras = getIntent().getExtras(); String imagePath = extras.getString(FotoActivity.EXTRA_IMAGE_PATH); Log.d("DFHprev", imagePath); mImage = new File(imagePath); if (mImage.exists()) { setResult(RESULT_OK); loadImage(mImage); } registerButtonCallbacks(); } @Override protected void onPause() { super.onPause(); } /** * Register callbacks for ui buttons */ protected void registerButtonCallbacks() { // Cancel button callback mCancel = (Button) findViewById(R.id.preview_send_cancel); mCancel.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { PreviewActivity.this.finish(); } }); // Confirm button callback mConfirm = (Button) findViewById(R.id.preview_send_confirm); mConfirm.setEnabled(true); mConfirm.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { new UploadImageTask().execute(mImage); } }); } /** * Initialize the dialogs */ @Override protected Dialog onCreateDialog(int id) { switch(id) { case UPLOAD_PROGRESS_DIALOG: mDialog = new ProgressDialog(this); mDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); mDialog.setCancelable(false); mDialog.setTitle(getString(R.string.progress_dialog_title_connecting)); return mDialog; case UPLOAD_ERROR_DIALOG: AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(R.string.upload_error_title) .setIcon(android.R.drawable.ic_dialog_alert) .setMessage(R.string.upload_error_message) .setCancelable(false) .setPositiveButton(getString(R.string.retry), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { PreviewActivity.this.finish(); } }); return builder.create(); case UPLOAD_SUCCESS_DIALOG: AlertDialog.Builder success = new AlertDialog.Builder(this); success.setTitle(R.string.upload_success_title) .setIcon(android.R.drawable.ic_dialog_info) .setMessage(R.string.upload_success_message) .setCancelable(false) .setPositiveButton(getString(R.string.success), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { PreviewActivity.this.finish(); } }); return success.create(); default: return null; } } /** * Prepare the progress dialog */ @Override protected void onPrepareDialog(int id, Dialog dialog) { switch(id) { case UPLOAD_PROGRESS_DIALOG: mDialog.setProgress(0); mDialog.setTitle(getString(R.string.progress_dialog_title_connecting)); } } /** * Load the image file into the imageView * * @param image */ protected void loadImage(File image) { Bitmap bm = BitmapFactory.decodeFile(image.getPath()); ImageView view = (ImageView) findViewById(R.id.preview_image); view.setImageBitmap(bm); } /** * Asynchronous task to upload file to server */ class UploadImageTask extends AsyncTask<File, Integer, Boolean> { /** Upload file to this url */ private static final String UPLOAD_URL = "http://www.xxxx.x/xxxx/fotos"; /** Send the file with this form name */ private static final String FIELD_FILE = "file"; /** * Prepare activity before upload */ @Override protected void onPreExecute() { super.onPreExecute(); setProgressBarIndeterminateVisibility(true); mConfirm.setEnabled(false); mCancel.setEnabled(false); showDialog(UPLOAD_PROGRESS_DIALOG); } /** * Clean app state after upload is completed */ @Override protected void onPostExecute(Boolean result) { super.onPostExecute(result); setProgressBarIndeterminateVisibility(false); mConfirm.setEnabled(true); mDialog.dismiss(); if (result) { showDialog(UPLOAD_SUCCESS_DIALOG); } else { showDialog(UPLOAD_ERROR_DIALOG); } } @Override protected Boolean doInBackground(File... image) { return doFileUpload(image[0], "UPLOAD_URL"); } @Override protected void onProgressUpdate(Integer... values) { super.onProgressUpdate(values); if (values[0] == 0) { mDialog.setTitle(getString(R.string.progress_dialog_title_uploading)); } mDialog.setProgress(values[0]); } private boolean doFileUpload(File file, String uploadUrl) { HttpURLConnection connection = null; DataOutputStream outputStream = null; DataInputStream inputStream = null; String pathToOurFile = file.getPath(); String urlServer = "http://www.xxxx.x/xxxx/upload.php"; String lineEnd = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; // log pathtoourfile Log.d("DFHinUpl", pathToOurFile); int bytesRead, bytesAvailable, bufferSize; byte[] buffer; int maxBufferSize = 1*1024*1024; int sentBytes = 0; long fileSize = file.length(); // log filesize String files= String.valueOf(fileSize); String buffers= String.valueOf(maxBufferSize); Log.d("fotosize",files); Log.d("buffers",buffers); try { FileInputStream fileInputStream = new FileInputStream(new File(pathToOurFile) ); URL url = new URL(urlServer); connection = (HttpURLConnection) url.openConnection(); // Allow Inputs & Outputs connection.setDoInput(true); connection.setDoOutput(true); connection.setUseCaches(false); // Enable POST method connection.setRequestMethod("POST"); connection.setRequestProperty("Connection", "Keep-Alive"); connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary); outputStream = new DataOutputStream( connection.getOutputStream() ); outputStream.writeBytes(twoHyphens + boundary + lineEnd); outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + pathToOurFile +"\"" + lineEnd); outputStream.writeBytes(lineEnd); bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); buffer = new byte[bufferSize]; // Read file bytesRead = fileInputStream.read(buffer, 0, bufferSize); while (bytesRead > 0) { outputStream.write(buffer, 0, bufferSize); bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); bytesRead = fileInputStream.read(buffer, 0, bufferSize); sentBytes += bufferSize; publishProgress((int)(sentBytes * 100 / fileSize)); bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); bytesRead = fileInputStream.read(buffer, 0, bufferSize); } outputStream.writeBytes(lineEnd); outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); // Responses from the server (code and message) int serverResponseCode = connection.getResponseCode(); String serverResponseMessage = connection.getResponseMessage(); fileInputStream.close(); outputStream.flush(); outputStream.close(); try { int responseCode = connection.getResponseCode(); return responseCode == 200; } catch (IOException ioex) { Log.e("DFHUPLOAD", "Upload file failed: " + ioex.getMessage(), ioex); return false; } catch (Exception e) { Log.e("DFHUPLOAD", "Upload file failed: " + e.getMessage(), e); return false; } } catch (Exception ex) { String msg= ex.getMessage(); Log.d("DFHUPLOAD", msg); } return true; } } } the PHP code that handles this upload is following: <?php $date=getdate(); $urldate=$date['year'].$date['month'].$date['month'].$date['hours'].$date['minutes'].$date[ 'seconds']; $target_path = "./"; $target_path = $target_path . basename( $_FILES['uploadedfile']['name']) . $urldate; if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) { echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded"; } else{ echo "There was an error uploading the file, please try again!"; } ?> would really appreciate it if someone could help me.

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• Why this C# Regular Expression crashes my program?

  - by robert_d

  using System; using System.IO; using System.Net; using System.Text.RegularExpressions; namespace Working { class Program4 { static string errorurl = "http://www.realtor.ca/propertyDetails.aspx?propertyId=8692663"; static void Main(string[] args) { string s; s = getWebpageContent(errorurl); s = removeNewLineCharacters(s); getFields(s); Console.WriteLine("End"); } public static void getFields(string html) { Match m; string fsRE = @"ismeasurement.*?>.*?(\d+).*?sqft"; m = Regex.Match(html, fsRE, RegexOptions.IgnoreCase); } private static string removeNewLineCharacters(string str) { string[] charsToRemove = new string[] { "\n", "\r" }; foreach (string c in charsToRemove) { str = str.Replace(c, ""); } return str; } static string getWebpageContent(string url) { WebClient client = new WebClient(); client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)"); Stream data = client.OpenRead(url); StreamReader reader = new StreamReader(data); string s = reader.ReadToEnd(); data.Close(); reader.Close(); return s; } } } This program hangs. It runs correctly when I remove RegexOptions.IgnoreCase option or when I remove call to removeNewLineCharacters() function. Could someone tell me what is going on, please?

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• Time complexity of a powerset generating function

  - by Lirik

  I'm trying to figure out the time complexity of a function that I wrote (it generates a power set for a given string): public static HashSet<string> GeneratePowerSet(string input) { HashSet<string> powerSet = new HashSet<string>(); if (string.IsNullOrEmpty(input)) return powerSet; int powSetSize = (int)Math.Pow(2.0, (double)input.Length); // Start at 1 to skip the empty string case for (int i = 1; i < powSetSize; i++) { string str = Convert.ToString(i, 2); string pset = str; for (int k = str.Length; k < input.Length; k++) { pset = "0" + pset; } string set = string.Empty; for (int j = 0; j < pset.Length; j++) { if (pset[j] == '1') { set = string.Concat(set, input[j].ToString()); } } powerSet.Add(set); } return powerSet; } So my attempt is this: let the size of the input string be n in the outer for loop, must iterate 2^n times (because the set size is 2^n). in the inner for loop, we must iterate 2*n times (at worst). 1. So Big-O would be O((2^n)*n) (since we drop the constant 2)... is that correct? And n*(2^n) is worse than n^2. if n = 4 then (4*(2^4)) = 64 (4^2) = 16 if n = 100 then (10*(2^10)) = 10240 (10^2) = 100 2. Is there a faster way to generate a power set, or is this about optimal?

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• the variable only have it value inside while loop?

  - by user1834467

  static void parse(String fileName) throws IOException{ FileReader fileReader=new FileReader((fileName)); BufferedReader bufferedReader = new BufferedReader(fileReader); StringBuilder stringBuilder=new StringBuilder(); String string; StringBuilder myString = null; while((string = bufferedReader.readLine()) != null) { myString =stringBuilder.append(string); String h=myString.toString(); **System.out.println(h);** } } static void parse(String fileName) throws IOException{ FileReader fileReader=new FileReader((fileName)); BufferedReader bufferedReader = new BufferedReader(fileReader); StringBuilder stringBuilder=new StringBuilder(); String string; StringBuilder myString = null; while((string = bufferedReader.readLine()) != null) { myString =stringBuilder.append(string); String h=myString.toString(); } **System.out.println(h);** } when I try the second part of the code, it print out nothing. how can I get the whole h String outside of the while loop? Is it I have to declare the variable h as instance variable instead of local variable?

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• Dual booting on separate hard drives

  - by tornadorider

  I have windows XP professional installed on 1 hard drive and Ubuntu 10.10 on my second hard drive. On start up the computer completely skips the grub menu and boots straight into 10.10. I have tried running os-prober with the windows hard drive mounted and then updating grub but it didnt work. Any ideas? I have changed the boot order so that the HDD with xp on it is first however the computer still booted into linux. I tried running grub-install /dev/sda and got this /usr/sbin/grub-setup: warn: Sector 32 is already in use by FlexNet; avoiding it. This software may cause boot or other problems in future. Please ask its authors not to store data in the boot track.. /usr/sbin/grub-setup: warn: Sector 33 is already in use by FlexNet; avoiding it. This software may cause boot or other problems in future. Please ask its authors not to store data in the boot track.. Installation finished. No error reported I checked using disk utility and the code for my xp hard drive is sdb so i ran the camand grub-install /dev/sdb shich gave me this Installation finished. No error reported. So i rebooted but it still didnt work. Any other ideas? Additional info gedit /boot/grub/grub.cfg: # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga } insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 load_video insmod gfxterm fi terminal_output gfxterm insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c set locale_dir=($root)/boot/grub/locale set lang=en insmod gettext if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### menuentry 'Ubuntu, with Linux 2.6.35-28-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c linux /boot/vmlinuz-2.6.35-28-generic root=UUID=d682c9bd-dd89-4827-9802-a1f921ebe21c ro quiet splash initrd /boot/initrd.img-2.6.35-28-generic } menuentry 'Ubuntu, with Linux 2.6.35-28-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c echo 'Loading Linux 2.6.35-28-generic ...' linux /boot/vmlinuz-2.6.35-28-generic root=UUID=d682c9bd-dd89-4827-9802-a1f921ebe21c ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.35-28-generic } menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c linux /boot/vmlinuz-2.6.35-22-generic root=UUID=d682c9bd-dd89-4827-9802-a1f921ebe21c ro quiet splash initrd /boot/initrd.img-2.6.35-22-generic } menuentry 'Ubuntu, with Linux 2.6.35-22-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c echo 'Loading Linux 2.6.35-22-generic ...' linux /boot/vmlinuz-2.6.35-22-generic root=UUID=d682c9bd-dd89-4827-9802-a1f921ebe21c ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.35-22-generic } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### if [ "x${timeout}" != "x-1" ]; then if keystatus; then if keystatus --shift; then set timeout=-1 else set timeout=0 fi else if sleep --interruptible 3 ; then set timeout=0 fi fi fi ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### sudo fdisk -l: Disk /dev/sda: 80.1 GB, 80060424192 bytes 255 heads, 63 sectors/track, 9733 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0008a483 Device Boot Start End Blocks Id System /dev/sda1 * 1 9352 75112448 83 Linux /dev/sda2 9352 9734 3068929 5 Extended /dev/sda5 9352 9734 3068928 82 Linux swap / Solaris Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc5d6c5d6 Device Boot Start End Blocks Id System /dev/sdb1 1 60800 488375968+ 7 HPFS/NTFS sudo blkid /dev/sda1: UUID="d682c9bd-dd89-4827-9802-a1f921ebe21c" TYPE="ext4" /dev/sda5: UUID="09e9c2cb-d903-4f0b-a181-536951845231" TYPE="swap" /dev/sdb1: UUID="B21844EB1844AFE1" TYPE="ntfs" sudo os-prober (nothing) Boot Info Script 0.55 dated February 15th, 2010 ============================= Boot Info Summary: ============================== => Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in partition #1 for (,msdos1)/boot/grub. => Grub 2 is installed in the MBR of /dev/sdb and looks on the same drive in partition #1 for (,msdos1)/boot/grub. sda1: _________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Ubuntu 10.10 Boot files/dirs: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img sda2: _________________________________________________________________________ File system: Extended Partition Boot sector type: Unknown Boot sector info: sda5: _________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: sdb1: _________________________________________________________________________ File system: ntfs Boot sector type: Windows XP Boot sector info: No errors found in the Boot Parameter Block. Operating System: Windows XP Boot files/dirs: =========================== Drive/Partition Info: ============================= Drive: sda ___________________ _____________________________________________________ Disk /dev/sda: 80.1 GB, 80060424192 bytes 255 heads, 63 sectors/track, 9733 cylinders, total 156368016 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start End Size Id System /dev/sda1 * 2,048 150,226,943 150,224,896 83 Linux /dev/sda2 150,228,990 156,366,847 6,137,858 5 Extended /dev/sda5 150,228,992 156,366,847 6,137,856 82 Linux swap / Solaris Drive: sdb ___________________ _____________________________________________________ Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start End Size Id System /dev/sdb1 * 63 976,751,999 976,751,937 7 HPFS/NTFS blkid -c /dev/null: ____________________________________________________________ Device UUID TYPE LABEL /dev/sda1 d682c9bd-dd89-4827-9802-a1f921ebe21c ext4 /dev/sda2: PTTYPE="dos" /dev/sda5 09e9c2cb-d903-4f0b-a181-536951845231 swap /dev/sda: PTTYPE="dos" /dev/sdb1 B21844EB1844AFE1 ntfs /dev/sdb: PTTYPE="dos" ============================ "mount | grep ^/dev output: =========================== Device Mount_Point Type Options /dev/sda1 / ext4 (rw,errors=remount-ro,commit=0) =========================== sda1/boot/grub/grub.cfg: =========================== # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga } insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 load_video insmod gfxterm fi terminal_output gfxterm insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c set locale_dir=($root)/boot/grub/locale set lang=en insmod gettext if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### menuentry 'Ubuntu, with Linux 2.6.35-28-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c linux /boot/vmlinuz-2.6.35-28-generic root=UUID=d682c9bd-dd89-4827-9802-a1f921ebe21c ro quiet splash initrd /boot/initrd.img-2.6.35-28-generic } menuentry 'Ubuntu, with Linux 2.6.35-28-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c echo 'Loading Linux 2.6.35-28-generic ...' linux /boot/vmlinuz-2.6.35-28-generic root=UUID=d682c9bd-dd89-4827-9802-a1f921ebe21c ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.35-28-generic } menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c linux /boot/vmlinuz-2.6.35-22-generic root=UUID=d682c9bd-dd89-4827-9802-a1f921ebe21c ro quiet splash initrd /boot/initrd.img-2.6.35-22-generic } menuentry 'Ubuntu, with Linux 2.6.35-22-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c echo 'Loading Linux 2.6.35-22-generic ...' linux /boot/vmlinuz-2.6.35-22-generic root=UUID=d682c9bd-dd89-4827-9802-a1f921ebe21c ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.35-22-generic } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set d682c9bd-dd89-4827-9802-a1f921ebe21c linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### if [ "x${timeout}" != "x-1" ]; then if keystatus; then if keystatus --shift; then set timeout=-1 else set timeout=0 fi else if sleep --interruptible 3 ; then set timeout=0 fi fi fi ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. menuentry "Windows XP" { set root=(hd1,1) chainloader (hd1,1)+1 } ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### =============================== sda1/etc/fstab: =============================== # /etc/fstab: static file system information. # # Use 'blkid -o value -s UUID' to print the universally unique identifier # for a device; this may be used with UUID= as a more robust way to name # devices that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 /dev/sda1 / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=09e9c2cb-d903-4f0b-a181-536951845231 none swap sw 0 0 =================== sda1: Location of files loaded by Grub: =================== 51.7GB: boot/grub/core.img 58.5GB: boot/grub/grub.cfg 1.2GB: boot/initrd.img-2.6.35-22-generic 1.3GB: boot/initrd.img-2.6.35-28-generic 58.2GB: boot/vmlinuz-2.6.35-22-generic 51.7GB: boot/vmlinuz-2.6.35-28-generic 1.3GB: initrd.img 1.2GB: initrd.img.old 51.7GB: vmlinuz 58.2GB: vmlinuz.old =========================== Unknown MBRs/Boot Sectors/etc ======================= Unknown BootLoader on sda2 00000000 d9 ed 13 ab ff a8 33 8c 01 b2 47 99 e1 4a b1 f1 |......3...G..J..| 00000010 69 5f a7 29 a4 1a 03 9e 31 b9 45 02 71 e6 58 78 |i_.)....1.E.q.Xx| 00000020 3d f6 ee 7b 3e 33 1b 82 c6 7d cf 1a c8 e7 bc 2f |=..{>3...}...../| 00000030 b9 e1 70 75 cf 18 aa e7 d5 7e 3c f1 b4 e7 9e 3a |..pu.....~<....:| 00000040 55 38 f1 b4 ee 78 59 0b 5e f7 3c 4c 57 73 9c 2a |U8...xY.^.<LWs.*| 00000050 28 f1 19 ed 11 9c b2 19 e2 80 92 1c 7b 84 ee 0b |(...........{...| 00000060 e2 c0 ac af 0a 50 42 b9 cf 0c dc 2c 20 77 85 dc |.....PB...., w..| 00000070 8f 70 5f 7b 84 9b a1 f7 8c 2d ee 70 5c ae f7 39 |.p_{.....-.p\..9| 00000080 63 f7 09 8a ec 79 4c ed 9f cc ad 3c f8 1b 47 7d |c....yL....<..G}| 00000090 3f 97 d5 16 cb 29 45 38 25 61 36 08 de 10 93 0f |?....)E8%a6.....| 000000a0 95 4f ea 54 f9 89 ff f1 bf 9a cc bb fd b6 22 b1 |.O.T..........".| 000000b0 65 08 05 21 78 19 46 b0 24 7e fb de d4 b3 ba d6 |e..!x.F.$~......| 000000c0 ec 11 65 82 ee 10 1d 12 04 91 da 6d 67 47 ea 9b |..e........mgG..| 000000d0 6f b0 aa fb cb 67 10 64 86 e8 26 85 fb f9 50 77 |o....g.d..&...Pw| 000000e0 9d 13 9b 9e d9 11 f3 a1 50 1b 11 b7 93 79 9f ab |........P....y..| 000000f0 c1 b6 86 0f 35 ed d4 9f dc f8 db bd ed 45 3a 68 |....5........E:h| 00000100 54 68 4a 1d d1 fc b8 c9 72 b4 d7 7b 60 e7 39 2f |ThJ.....r..{`.9/| 00000110 2a 0a 4e 52 72 52 c6 e2 2a 55 6a 2a e1 82 40 71 |*.NRrR..*Uj*..@q| 00000120 11 11 e0 53 d6 ff 1b a9 c6 65 df 1e b7 15 6f a2 |...S.....e....o.| 00000130 15 02 a4 6d 19 b7 78 57 a6 ee 9e 36 08 7d 6f 7c |...m..xW...6.}o|| 00000140 fd f7 7c d5 40 ff 0f c7 97 dc aa 00 ce 8b bb dc |..|.@...........| 00000150 e2 eb 1c 50 74 d8 14 cc 9a d6 5c a2 ab f2 67 f9 |...Pt.....\...g.| 00000160 58 ed 43 79 0e 78 7a 5c a6 f8 7b e8 05 4e 62 8a |X.Cy.xz\..{..Nb.| 00000170 0a 5f 22 ee a6 38 b9 e1 32 45 97 08 cc 75 66 c6 |._"..8..2E...uf.| 00000180 b3 a2 2d 89 a1 e9 95 21 28 53 fd dd be b1 b2 a2 |..-....!(S......| 00000190 78 3f a3 c9 3d e3 31 54 88 cf 78 0d e1 21 a8 74 |x?..=.1T..x..!.t| 000001a0 06 60 9d 21 c6 7a 24 e1 cc 28 f8 98 e0 99 e3 fc |.`.!.z$..(......| 000001b0 fa 8b eb d5 56 03 20 b8 54 ba c6 ee 9f 57 00 fe |....V. .T....W..| 000001c0 ff ff 82 fe ff ff 02 00 00 00 00 a8 5d 00 00 00 |............]...| 000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.| 00000200

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• When I shutdown the computer, it restarts

  - by Prabu

  I am unable to shutdown. Whenever I try to shutdown, it reboots. I am running Ubuntu 12.10. I have run the boot-repair and this is the result: Boot Info Script 0.61.full + Boot-Repair extra info [Boot-Info November 20th 2012] ============================= Boot Info Summary: =============================== => Grub2 (v2.00) is installed in the MBR of /dev/sda and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks in partition 1 for (,msdos1)/boot/grub. sda1: __________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Ubuntu 12.10 Boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/i386-pc/core.img sda2: __________________________________________________________________________ File system: Extended Partition Boot sector type: - Boot sector info: sda5: __________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: ============================ Drive/Partition Info: ============================= Drive: sda _____________________________________________________________________ Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/sda1 * 2,048 1,936,809,983 1,936,807,936 83 Linux /dev/sda2 1,936,812,030 1,953,523,711 16,711,682 5 Extended /dev/sda5 1,936,812,032 1,953,523,711 16,711,680 82 Linux swap / Solaris "blkid" output: ________________________________________________________________ Device UUID TYPE LABEL /dev/loop0 squashfs /dev/sda1 229a5484-7659-4ce1-98ce-2f05f61a1ffa ext4 /dev/sda5 6c6dca25-ab67-4de4-8602-26fdb6154781 swap /dev/sr0 iso9660 Ubuntu 12.10 amd64 ================================ Mount points: ================================= Device Mount_Point Type Options /dev/loop0 /rofs squashfs (ro,noatime) /dev/sr0 /cdrom iso9660 (ro,noatime) =========================== sda1/boot/grub/grub.cfg: =========================== -------------------------------------------------------------------------------- # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ x"${feature_menuentry_id}" = xy ]; then menuentry_id_option="--id" else menuentry_id_option="" fi export menuentry_id_option if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { if [ x$feature_all_video_module = xy ]; then insmod all_video else insmod efi_gop insmod efi_uga insmod ieee1275_fb insmod vbe insmod vga insmod video_bochs insmod video_cirrus fi } if [ x$feature_default_font_path = xy ] ; then font=unicode else insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 229a5484-7659-4ce1-98ce-2f05f61a1ffa else search --no-floppy --fs-uuid --set=root 229a5484-7659-4ce1-98ce-2f05f61a1ffa fi font="/usr/share/grub/unicode.pf2" fi if loadfont $font ; then set gfxmode=auto load_video insmod gfxterm set locale_dir=$prefix/locale set lang=en_US insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ]; then set timeout=10 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### function gfxmode { set gfxpayload="${1}" if [ "${1}" = "keep" ]; then set vt_handoff=vt.handoff=7 else set vt_handoff= fi } if [ "${recordfail}" != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "${linux_gfx_mode}" != "text" ]; then load_video; fi menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-229a5484-7659-4ce1-98ce-2f05f61a1ffa' { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 229a5484-7659-4ce1-98ce-2f05f61a1ffa else search --no-floppy --fs-uuid --set=root 229a5484-7659-4ce1-98ce-2f05f61a1ffa fi linux /boot/vmlinuz-3.5.0-19-generic root=UUID=229a5484-7659-4ce1-98ce-2f05f61a1ffa ro quiet splash acpi=force $vt_handoff initrd /boot/initrd.img-3.5.0-19-generic } submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-229a5484-7659-4ce1-98ce-2f05f61a1ffa' { menuentry 'Ubuntu, with Linux 3.5.0-19-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-19-generic-advanced-229a5484-7659-4ce1-98ce-2f05f61a1ffa' { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 229a5484-7659-4ce1-98ce-2f05f61a1ffa else search --no-floppy --fs-uuid --set=root 229a5484-7659-4ce1-98ce-2f05f61a1ffa fi echo 'Loading Linux 3.5.0-19-generic ...' linux /boot/vmlinuz-3.5.0-19-generic root=UUID=229a5484-7659-4ce1-98ce-2f05f61a1ffa ro quiet splash acpi=force $vt_handoff echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.5.0-19-generic } menuentry 'Ubuntu, with Linux 3.5.0-19-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-19-generic-recovery-229a5484-7659-4ce1-98ce-2f05f61a1ffa' { recordfail insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 229a5484-7659-4ce1-98ce-2f05f61a1ffa else search --no-floppy --fs-uuid --set=root 229a5484-7659-4ce1-98ce-2f05f61a1ffa fi echo 'Loading Linux 3.5.0-19-generic ...' linux /boot/vmlinuz-3.5.0-19-generic root=UUID=229a5484-7659-4ce1-98ce-2f05f61a1ffa ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.5.0-19-generic } menuentry 'Ubuntu, with Linux 3.5.0-17-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-17-generic-advanced-229a5484-7659-4ce1-98ce-2f05f61a1ffa' { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 229a5484-7659-4ce1-98ce-2f05f61a1ffa else search --no-floppy --fs-uuid --set=root 229a5484-7659-4ce1-98ce-2f05f61a1ffa fi echo 'Loading Linux 3.5.0-17-generic ...' linux /boot/vmlinuz-3.5.0-17-generic root=UUID=229a5484-7659-4ce1-98ce-2f05f61a1ffa ro quiet splash acpi=force $vt_handoff echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.5.0-17-generic } menuentry 'Ubuntu, with Linux 3.5.0-17-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-17-generic-recovery-229a5484-7659-4ce1-98ce-2f05f61a1ffa' { recordfail insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 229a5484-7659-4ce1-98ce-2f05f61a1ffa else search --no-floppy --fs-uuid --set=root 229a5484-7659-4ce1-98ce-2f05f61a1ffa fi echo 'Loading Linux 3.5.0-17-generic ...' linux /boot/vmlinuz-3.5.0-17-generic root=UUID=229a5484-7659-4ce1-98ce-2f05f61a1ffa ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.5.0-17-generic } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 229a5484-7659-4ce1-98ce-2f05f61a1ffa else search --no-floppy --fs-uuid --set=root 229a5484-7659-4ce1-98ce-2f05f61a1ffa fi linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 229a5484-7659-4ce1-98ce-2f05f61a1ffa else search --no-floppy --fs-uuid --set=root 229a5484-7659-4ce1-98ce-2f05f61a1ffa fi linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/30_uefi-firmware ### ### END /etc/grub.d/30_uefi-firmware ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f ${config_directory}/custom.cfg ]; then source ${config_directory}/custom.cfg elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### -------------------------------------------------------------------------------- =============================== sda1/etc/fstab: ================================ -------------------------------------------------------------------------------- # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sda1 during installation UUID=229a5484-7659-4ce1-98ce-2f05f61a1ffa / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=6c6dca25-ab67-4de4-8602-26fdb6154781 none swap sw 0 0 -------------------------------------------------------------------------------- =================== sda1: Location of files loaded by Grub: ==================== GiB - GB File Fragment(s) 200.155235291 = 214.915047424 boot/grub/grub.cfg 1 40.280788422 = 43.251167232 boot/initrd.img-3.5.0-17-generic 1 2.468288422 = 2.650304512 boot/initrd.img-3.5.0-19-generic 1 200.149234772 = 214.908604416 boot/vmlinuz-3.5.0-17-generic 1 1.990135193 = 2.136891392 boot/vmlinuz-3.5.0-19-generic 1 2.468288422 = 2.650304512 initrd.img 1 1.990135193 = 2.136891392 vmlinuz 1 1.990135193 = 2.136891392 vmlinuz.old 1 =============================== StdErr Messages: =============================== cat: write error: Broken pipe File descriptor 8 (/proc/6297/mounts) leaked on lvscan invocation. Parent PID 13390: bash No volume groups found ADDITIONAL INFORMATION : =================== log of boot-repair 2012-12-17__01h53 =================== boot-repair version : 3.197~ppa1~quantal boot-sav version : 3.197~ppa1~quantal glade2script version : 3.2.2~ppa45~quantal boot-sav-extra version : 3.197~ppa1~quantal boot-repair is executed in live-session (Ubuntu 12.10, quantal, Ubuntu, x86_64) CPU op-mode(s): 32-bit, 64-bit file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity =================== os-prober: /dev/sda1:Ubuntu 12.10 (12.10):Ubuntu:linux =================== blkid: /dev/loop0: TYPE="squashfs" /dev/sr0: LABEL="Ubuntu 12.10 amd64" TYPE="iso9660" /dev/sda1: UUID="229a5484-7659-4ce1-98ce-2f05f61a1ffa" TYPE="ext4" /dev/sda5: UUID="6c6dca25-ab67-4de4-8602-26fdb6154781" TYPE="swap" 1 disks with OS, 1 OS : 1 Linux, 0 MacOS, 0 Windows, 0 unknown type OS. Warning: extended partition does not start at a cylinder boundary. DOS and Linux will interpret the contents differently. =================== sda1/etc/default/grub : # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" =================== sda1/etc/grub.d/ : drwxr-xr-x 2 root root 4096 Oct 17 14:59 grub.d total 72 -rwxr-xr-x 1 root root 7541 Oct 14 17:36 00_header -rwxr-xr-x 1 root root 5488 Oct 4 09:30 05_debian_theme -rwxr-xr-x 1 root root 10891 Oct 14 17:36 10_linux -rwxr-xr-x 1 root root 10258 Oct 14 17:36 20_linux_xen -rwxr-xr-x 1 root root 1688 Oct 11 14:10 20_memtest86+ -rwxr-xr-x 1 root root 10976 Oct 14 17:36 30_os-prober -rwxr-xr-x 1 root root 1426 Oct 14 17:36 30_uefi-firmware -rwxr-xr-x 1 root root 214 Oct 14 17:36 40_custom -rwxr-xr-x 1 root root 216 Oct 14 17:36 41_custom -rw-r--r-- 1 root root 483 Oct 14 17:36 README =================== UEFI/Legacy mode: This live-session is not in EFI-mode. SecureBoot maybe enabled. =================== PARTITIONS & DISKS: sda1 : sda, not-sepboot, grubenv-ok grub2, grub-pc , update-grub, 64, with-boot, is-os, not--efi--part, fstab-without-boot, fstab-without-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, apt-get, grub-install, with--usr, fstab-without-usr, not-sep-usr, standard, farbios, /mnt/boot-sav/sda1. sda : not-GPT, BIOSboot-not-needed, has-no-EFIpart, not-usb, has-os, 2048 sectors * 512 bytes =================== parted -l: Model: ATA ST1000DM003-1CH1 (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 992GB 992GB primary ext4 boot 2 992GB 1000GB 8556MB extended 5 992GB 1000GB 8556MB logical linux-swap(v1) Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: Can't have a partition outside the disk! =================== parted -lm: BYT; /dev/sda:1000GB:scsi:512:4096:msdos:ATA ST1000DM003-1CH1; 1:1049kB:992GB:992GB:ext4::boot; 2:992GB:1000GB:8556MB:::; 5:992GB:1000GB:8556MB:linux-swap(v1)::; Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: Can't have a partition outside the disk! =================== mount: /cow on / type overlayfs (rw) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) /dev/sr0 on /cdrom type iso9660 (ro,noatime) /dev/loop0 on /rofs type squashfs (ro,noatime) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) tmpfs on /tmp type tmpfs (rw,nosuid,nodev) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755) gvfsd-fuse on /run/user/ubuntu/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=ubuntu) /dev/sda1 on /mnt/boot-sav/sda1 type ext4 (rw) =================== ls: /sys/block/sda (filtered): alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight power queue range removable ro sda1 sda2 sda5 size slaves stat subsystem trace uevent /sys/block/sr0 (filtered): alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range holders inflight power queue range removable ro size slaves stat subsystem trace uevent /dev (filtered): alarm ashmem autofs binder block bsg btrfs-control bus cdrom cdrw char console core cpu cpu_dma_latency disk dri dvd dvdrw ecryptfs fb0 fd full fuse fw0 hidraw0 hidraw1 hpet input kmsg kvm log mapper mcelog mei mem net network_latency network_throughput null oldmem port ppp psaux ptmx pts random rfkill rtc rtc0 sda sda1 sda2 sda5 sg0 sg1 shm snapshot snd sr0 stderr stdin stdout uinput urandom usb vga_arbiter vhost-net zero ls /dev/mapper: control =================== df -Th: Filesystem Type Size Used Avail Use% Mounted on /cow overlayfs 3.9G 100M 3.8G 3% / udev devtmpfs 3.9G 12K 3.9G 1% /dev tmpfs tmpfs 1.6G 864K 1.6G 1% /run /dev/sr0 iso9660 763M 763M 0 100% /cdrom /dev/loop0 squashfs 717M 717M 0 100% /rofs tmpfs tmpfs 3.9G 32K 3.9G 1% /tmp none tmpfs 5.0M 4.0K 5.0M 1% /run/lock none tmpfs 3.9G 176K 3.9G 1% /run/shm none tmpfs 100M 52K 100M 1% /run/user /dev/sda1 ext4 910G 26G 838G 3% /mnt/boot-sav/sda1 =================== fdisk -l: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x000da1e9 Device Boot Start End Blocks Id System /dev/sda1 * 2048 1936809983 968403968 83 Linux /dev/sda2 1936812030 1953523711 8355841 5 Extended Partition 2 does not start on physical sector boundary. /dev/sda5 1936812032 1953523711 8355840 82 Linux swap / Solaris Partition outside the disk detected. =================== Recommended repair Recommended-Repair This setting will reinstall the grub2 of sda1 into the MBR of sda. Additional repair will be performed: unhide-bootmenu-10s Unhide GRUB boot menu in sda1/etc/default/grub grub-install (GRUB) 2.00-7ubuntu11,grub-install (GRUB) 2. Reinstall the GRUB of sda1 into the MBR of sda Installation finished. No error reported. grub-install /dev/sda: exit code of grub-install /dev/sda:0 chroot /mnt/boot-sav/sda1 update-grub Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.5.0-19-generic Found initrd image: /boot/initrd.img-3.5.0-19-generic Found linux image: /boot/vmlinuz-3.5.0-17-generic Found initrd image: /boot/initrd.img-3.5.0-17-generic Found memtest86+ image: /boot/memtest86+.bin Unhide GRUB boot menu in sda1/boot/grub/grub.cfg Boot successfully repaired. You can now reboot your computer.

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• Adding SQL Cache Dependencies to the Loosely coupled .NET Cache Provider

  - by Rhames

  This post adds SQL Cache Dependency support to the loosely coupled .NET Cache Provider that I described in the previous post (http://geekswithblogs.net/Rhames/archive/2012/09/11/loosely-coupled-.net-cache-provider-using-dependency-injection.aspx). The sample code is available on github at https://github.com/RobinHames/CacheProvider.git. Each time we want to apply a cache dependency to a call to fetch or cache a data item we need to supply an instance of the relevant dependency implementation. This suggests an Abstract Factory will be useful to create cache dependencies as needed. We can then use Dependency Injection to inject the factory into the relevant consumer. Castle Windsor provides a typed factory facility that will be utilised to implement the cache dependency abstract factory (see http://docs.castleproject.org/Windsor.Typed-Factory-Facility-interface-based-factories.ashx). Cache Dependency Interfaces First I created a set of cache dependency interfaces in the domain layer, which can be used to pass a cache dependency into the cache provider. ICacheDependency The ICacheDependency interface is simply an empty interface that is used as a parent for the specific cache dependency interfaces. This will allow us to place a generic constraint on the Cache Dependency Factory, and will give us a type that can be passed into the relevant Cache Provider methods. namespace CacheDiSample.Domain.CacheInterfaces { public interface ICacheDependency { } }   ISqlCacheDependency.cs The ISqlCacheDependency interface provides specific SQL caching details, such as a Sql Command or a database connection and table. It is the concrete implementation of this interface that will be created by the factory in passed into the Cache Provider. using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace CacheDiSample.Domain.CacheInterfaces { public interface ISqlCacheDependency : ICacheDependency { ISqlCacheDependency Initialise(string databaseConnectionName, string tableName); ISqlCacheDependency Initialise(System.Data.SqlClient.SqlCommand sqlCommand); } } If we want other types of cache dependencies, such as by key or file, interfaces may be created to support these (the sample code includes an IKeyCacheDependency interface). Modifying ICacheProvider to accept Cache Dependencies Next I modified the exisitng ICacheProvider<T> interface so that cache dependencies may be passed into a Fetch method call. I did this by adding two overloads to the existing Fetch methods, which take an IEnumerable<ICacheDependency> parameter (the IEnumerable allows more than one cache dependency to be included). I also added a method to create cache dependencies. This means that the implementation of the Cache Provider will require a dependency on the Cache Dependency Factory. It is pretty much down to personal choice as to whether this approach is taken, or whether the Cache Dependency Factory is injected directly into the repository or other consumer of Cache Provider. I think, because the cache dependency cannot be used without the Cache Provider, placing the dependency on the factory into the Cache Provider implementation is cleaner. ICacheProvider.cs using System; using System.Collections.Generic;   namespace CacheDiSample.Domain.CacheInterfaces { public interface ICacheProvider<T> { T Fetch(string key, Func<T> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry); T Fetch(string key, Func<T> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry, IEnumerable<ICacheDependency> cacheDependencies);   IEnumerable<T> Fetch(string key, Func<IEnumerable<T>> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry); IEnumerable<T> Fetch(string key, Func<IEnumerable<T>> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry, IEnumerable<ICacheDependency> cacheDependencies);   U CreateCacheDependency<U>() where U : ICacheDependency; } }   Cache Dependency Factory Next I created the interface for the Cache Dependency Factory in the domain layer. ICacheDependencyFactory.cs namespace CacheDiSample.Domain.CacheInterfaces { public interface ICacheDependencyFactory { T Create<T>() where T : ICacheDependency;   void Release<T>(T cacheDependency) where T : ICacheDependency; } }   I used the ICacheDependency parent interface as a generic constraint on the create and release methods in the factory interface. Now the interfaces are in place, I moved on to the concrete implementations. ISqlCacheDependency Concrete Implementation The concrete implementation of ISqlCacheDependency will need to provide an instance of System.Web.Caching.SqlCacheDependency to the Cache Provider implementation. Unfortunately this class is sealed, so I cannot simply inherit from this. Instead, I created an interface called IAspNetCacheDependency that will provide a Create method to create an instance of the relevant System.Web.Caching Cache Dependency type. This interface is specific to the ASP.NET implementation of the Cache Provider, so it should be defined in the same layer as the concrete implementation of the Cache Provider (the MVC UI layer in the sample code). IAspNetCacheDependency.cs using System.Web.Caching;   namespace CacheDiSample.CacheProviders { public interface IAspNetCacheDependency { CacheDependency CreateAspNetCacheDependency(); } }   Next, I created the concrete implementation of the ISqlCacheDependency interface. This class also implements the IAspNetCacheDependency interface. This concrete implementation also is defined in the same layer as the Cache Provider implementation. AspNetSqlCacheDependency.cs using System.Web.Caching; using CacheDiSample.Domain.CacheInterfaces;   namespace CacheDiSample.CacheProviders { public class AspNetSqlCacheDependency : ISqlCacheDependency, IAspNetCacheDependency { private string databaseConnectionName;   private string tableName;   private System.Data.SqlClient.SqlCommand sqlCommand;   #region ISqlCacheDependency Members   public ISqlCacheDependency Initialise(string databaseConnectionName, string tableName) { this.databaseConnectionName = databaseConnectionName; this.tableName = tableName; return this; }   public ISqlCacheDependency Initialise(System.Data.SqlClient.SqlCommand sqlCommand) { this.sqlCommand = sqlCommand; return this; }   #endregion   #region IAspNetCacheDependency Members   public System.Web.Caching.CacheDependency CreateAspNetCacheDependency() { if (sqlCommand != null) return new SqlCacheDependency(sqlCommand); else return new SqlCacheDependency(databaseConnectionName, tableName); }   #endregion   } }   ICacheProvider Concrete Implementation The ICacheProvider interface is implemented by the CacheProvider class. This implementation is modified to include the changes to the ICacheProvider interface. First I needed to inject the Cache Dependency Factory into the Cache Provider: private ICacheDependencyFactory cacheDependencyFactory;   public CacheProvider(ICacheDependencyFactory cacheDependencyFactory) { if (cacheDependencyFactory == null) throw new ArgumentNullException("cacheDependencyFactory");   this.cacheDependencyFactory = cacheDependencyFactory; }   Next I implemented the CreateCacheDependency method, which simply passes on the create request to the factory: public U CreateCacheDependency<U>() where U : ICacheDependency { return this.cacheDependencyFactory.Create<U>(); }   The signature of the FetchAndCache helper method was modified to take an additional IEnumerable<ICacheDependency> parameter:   private U FetchAndCache<U>(string key, Func<U> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry, IEnumerable<ICacheDependency> cacheDependencies) and the following code added to create the relevant System.Web.Caching.CacheDependency object for any dependencies and pass them to the HttpContext Cache: CacheDependency aspNetCacheDependencies = null;   if (cacheDependencies != null) { if (cacheDependencies.Count() == 1) // We know that the implementations of ICacheDependency will also implement IAspNetCacheDependency // so we can use a cast here and call the CreateAspNetCacheDependency() method aspNetCacheDependencies = ((IAspNetCacheDependency)cacheDependencies.ElementAt(0)).CreateAspNetCacheDependency(); else if (cacheDependencies.Count() > 1) { AggregateCacheDependency aggregateCacheDependency = new AggregateCacheDependency(); foreach (ICacheDependency cacheDependency in cacheDependencies) { // We know that the implementations of ICacheDependency will also implement IAspNetCacheDependency // so we can use a cast here and call the CreateAspNetCacheDependency() method aggregateCacheDependency.Add(((IAspNetCacheDependency)cacheDependency).CreateAspNetCacheDependency()); } aspNetCacheDependencies = aggregateCacheDependency; } }   HttpContext.Current.Cache.Insert(key, value, aspNetCacheDependencies, absoluteExpiry.Value, relativeExpiry.Value);   The full code listing for the modified CacheProvider class is shown below: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Caching; using CacheDiSample.Domain.CacheInterfaces;   namespace CacheDiSample.CacheProviders { public class CacheProvider<T> : ICacheProvider<T> { private ICacheDependencyFactory cacheDependencyFactory;   public CacheProvider(ICacheDependencyFactory cacheDependencyFactory) { if (cacheDependencyFactory == null) throw new ArgumentNullException("cacheDependencyFactory");   this.cacheDependencyFactory = cacheDependencyFactory; }   public T Fetch(string key, Func<T> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry) { return FetchAndCache<T>(key, retrieveData, absoluteExpiry, relativeExpiry, null); }   public T Fetch(string key, Func<T> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry, IEnumerable<ICacheDependency> cacheDependencies) { return FetchAndCache<T>(key, retrieveData, absoluteExpiry, relativeExpiry, cacheDependencies); }   public IEnumerable<T> Fetch(string key, Func<IEnumerable<T>> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry) { return FetchAndCache<IEnumerable<T>>(key, retrieveData, absoluteExpiry, relativeExpiry, null); }   public IEnumerable<T> Fetch(string key, Func<IEnumerable<T>> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry, IEnumerable<ICacheDependency> cacheDependencies) { return FetchAndCache<IEnumerable<T>>(key, retrieveData, absoluteExpiry, relativeExpiry, cacheDependencies); }   public U CreateCacheDependency<U>() where U : ICacheDependency { return this.cacheDependencyFactory.Create<U>(); }   #region Helper Methods   private U FetchAndCache<U>(string key, Func<U> retrieveData, DateTime? absoluteExpiry, TimeSpan? relativeExpiry, IEnumerable<ICacheDependency> cacheDependencies) { U value; if (!TryGetValue<U>(key, out value)) { value = retrieveData(); if (!absoluteExpiry.HasValue) absoluteExpiry = Cache.NoAbsoluteExpiration;   if (!relativeExpiry.HasValue) relativeExpiry = Cache.NoSlidingExpiration;   CacheDependency aspNetCacheDependencies = null;   if (cacheDependencies != null) { if (cacheDependencies.Count() == 1) // We know that the implementations of ICacheDependency will also implement IAspNetCacheDependency // so we can use a cast here and call the CreateAspNetCacheDependency() method aspNetCacheDependencies = ((IAspNetCacheDependency)cacheDependencies.ElementAt(0)).CreateAspNetCacheDependency(); else if (cacheDependencies.Count() > 1) { AggregateCacheDependency aggregateCacheDependency = new AggregateCacheDependency(); foreach (ICacheDependency cacheDependency in cacheDependencies) { // We know that the implementations of ICacheDependency will also implement IAspNetCacheDependency // so we can use a cast here and call the CreateAspNetCacheDependency() method aggregateCacheDependency.Add( ((IAspNetCacheDependency)cacheDependency).CreateAspNetCacheDependency()); } aspNetCacheDependencies = aggregateCacheDependency; } }   HttpContext.Current.Cache.Insert(key, value, aspNetCacheDependencies, absoluteExpiry.Value, relativeExpiry.Value);   } return value; }   private bool TryGetValue<U>(string key, out U value) { object cachedValue = HttpContext.Current.Cache.Get(key); if (cachedValue == null) { value = default(U); return false; } else { try { value = (U)cachedValue; return true; } catch { value = default(U); return false; } } }   #endregion } }   Wiring up the DI Container Now the implementations for the Cache Dependency are in place, I wired them up in the existing Windsor CacheInstaller. First I needed to register the implementation of the ISqlCacheDependency interface: container.Register( Component.For<ISqlCacheDependency>() .ImplementedBy<AspNetSqlCacheDependency>() .LifestyleTransient());   Next I registered the Cache Dependency Factory. Notice that I have not implemented the ICacheDependencyFactory interface. Castle Windsor will do this for me by using the Type Factory Facility. I do need to bring the Castle.Facilities.TypedFacility namespace into scope: using Castle.Facilities.TypedFactory;   Then I registered the factory: container.AddFacility<TypedFactoryFacility>();   container.Register( Component.For<ICacheDependencyFactory>() .AsFactory()); The full code for the CacheInstaller class is: using Castle.MicroKernel.Registration; using Castle.MicroKernel.SubSystems.Configuration; using Castle.Windsor; using Castle.Facilities.TypedFactory;   using CacheDiSample.Domain.CacheInterfaces; using CacheDiSample.CacheProviders;   namespace CacheDiSample.WindsorInstallers { public class CacheInstaller : IWindsorInstaller { public void Install(IWindsorContainer container, IConfigurationStore store) { container.Register( Component.For(typeof(ICacheProvider<>)) .ImplementedBy(typeof(CacheProvider<>)) .LifestyleTransient());   container.Register( Component.For<ISqlCacheDependency>() .ImplementedBy<AspNetSqlCacheDependency>() .LifestyleTransient());   container.AddFacility<TypedFactoryFacility>();   container.Register( Component.For<ICacheDependencyFactory>() .AsFactory()); } } }   Configuring the ASP.NET SQL Cache Dependency There are a couple of configuration steps required to enable SQL Cache Dependency for the application and database. From the Visual Studio Command Prompt, the following commands should be used to enable the Cache Polling of the relevant database tables: aspnet_regsql -S <servername> -E -d <databasename> –ed aspnet_regsql -S <servername> -E -d CacheSample –et –t <tablename>   (The –t option should be repeated for each table that is to be made available for cache dependencies). Finally the SQL Cache Polling needs to be enabled by adding the following configuration to the <system.web> section of web.config: <caching> <sqlCacheDependency pollTime="10000" enabled="true"> <databases> <add name="BloggingContext" connectionStringName="BloggingContext"/> </databases> </sqlCacheDependency> </caching>   (obviously the name and connection string name should be altered as required). Using a SQL Cache Dependency Now all the coding is complete. To specify a SQL Cache Dependency, I can modify my BlogRepositoryWithCaching decorator class (see the earlier post) as follows: public IList<Blog> GetAll() { var sqlCacheDependency = cacheProvider.CreateCacheDependency<ISqlCacheDependency>() .Initialise("BloggingContext", "Blogs");   ICacheDependency[] cacheDependencies = new ICacheDependency[] { sqlCacheDependency };   string key = string.Format("CacheDiSample.DataAccess.GetAll");   return cacheProvider.Fetch(key, () => { return parentBlogRepository.GetAll(); }, null, null, cacheDependencies) .ToList(); }   This will add a dependency of the “Blogs” table in the database. The data will remain in the cache until the contents of this table change, then the cache item will be invalidated, and the next call to the GetAll() repository method will be routed to the parent repository to refresh the data from the database.

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• How to change font and set word wrap viewing for "find symbol search" result in Visual Studio 2010?

  - by Nam Gi VU

  I want to set the font and be able to view in word wrap mode when viewing the results after making a search for a symbol (I often search for references of a method). I don't know how to do this.

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• How to search for alphanumeric word before or after a keyword in perl?

  - by aliocee

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• What is the object of the Contact application search option ?

  - by Spredzy

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• Eclipse - how to simultaneously switch working set for project explorer, call hierarchy, and search?

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• How do you search between two columns using a parameter and a case when statement? SQL Server

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• Business Applications: What are the fundemental features of a search form?

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• Is there any better search method instead of string.Contains("keyword") using asp.net?

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• Business Applications: What are the fundamental features of a search form?

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